the mistake was on my part

That's absolutely good

Dave

HifaMoI'm sorry. The mistake was on my part.

It's fine, but most would say: "It was my mistake." or "The mistake was mine."

dave_anonThat's absolutely good

Perhaps it's my advanced age, but that sentence sounds unnatural to me.

Hi

Funnily enough, I thought maybe it was only natural to me because of my advanced age

Here it is in FreeDic ...

http://idioms.thefreedictionary.com/on+the+part+of

Dave

The sentence I was referring to was "That's absolutely good".

Hi

Oh, I see. I really can't think of a problem with it. Here it is in use by a professor of philosophy at Princeton ...

http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199844463.001.0001/acprof-9780199844463-chapte

Dave, I was talking about your "That's absolutely good" as a comment on the correctness of a sentence. I do not think that 'that's absolutely good' is natural in that context.

Hi

Not everything posted on EF is quite right. Of course, otherwise people wouldn't need to post it. But when I see something that looks quite natural to me, I think "That's absolutely good!"

Dave

dave_anonHiNot everything posted on EF is quite right. Of course, otherwise people wouldn't need to post it. But when I see something that looks quite natural to me, I think "That's absolutely good!"Dave

I still think it is unnatural, at least in British English. There are no citations for it in the British National Corpus.

Hi

If I had to consult the BNC every time a thought popped into my head, life might become quite difficult

Dave :-)